::cue - CSS: Cascading Style Sheets 编辑

The ::cue CSS pseudo-element matches WebVTT cues within a selected element. This can be used to style captions and other cues in media with VTT tracks.

::cue {
  color: yellow;
  font-weight: bold;
}

The properties are applied to the entire set of cues as if they were a single unit. The only exception is that background and its longhand properties apply to each cue individually, to avoid creating boxes and obscuring unexpectedly large areas of the media.

Syntax

::cue | ::cue( <selector> )

Permitted properties

Rules whose selectors include this element may only use the following CSS properties:

• background
• background-attachment
• background-clip
• background-color
• background-image
• background-origin
• background-position
• background-repeat
• background-size
• color
• font
• font-family
• font-size
• font-stretch
• font-style
• font-variant
• font-weight
• line-height
• opacity
• outline
• outline-color
• outline-style
• outline-width
• ruby-position
• text-combine-upright
• text-decoration
• text-decoration-color
• text-decoration-line
• text-decoration-style
• text-decoration-thickness
• text-shadow
• visibility
• white-space

Examples

Styling WebVTT cues as white-on-black

The following CSS sets the cue style so that the text is white and the background is a translucent black box.

::cue {
  color: #fff;
  background-color: rgba(0, 0, 0, 0.6);
}

Specifications

Browser compatibility

BCD tables only load in the browser

See also

• Web Video Tracks Format (WebVTT)
• <track>, <video>